import requests
import json
import logging
import time
from datetime import datetime
from typing import List, Dict
from bs4 import BeautifulSoup

class WeiboCrawler:
    def __init__(self):
        self.headers = {
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36',
            'Accept': 'application/json, text/plain, */*',
            'Accept-Language': 'zh-CN,zh;q=0.9,en;q=0.8',
            'Referer': 'https://s.weibo.com/'
        }
        self.logger = logging.getLogger(__name__)
        self.search_url = 'https://s.weibo.com/weibo'
        
    def fetch_weibo_by_keyword(self, keyword: str, page: int = 1, count: int = 20) -> List[Dict]:
        """
        根据关键词获取微博数据
        
        Args:
            keyword: 搜索关键词
            page: 页码
            count: 每页数量
            
        Returns:
            微博数据列表
        """
        try:
            # 注意：这里是模拟数据，实际应用中需要根据微博API或爬虫规则获取
            # 微博搜索页面需要登录，且有反爬机制，这里仅作示例
            
            # 模拟数据
            weibo_posts = []
            for i in range(count):
                post_id = f"{int(time.time())}{i}"
                post = {
                    'id': post_id,
                    'content': f"这是一条关于{keyword}的微博内容示例 #{i+1}，包含了一些相关信息和观点。",
                    'author': f"用户{i+1}",
                    'publish_time': datetime.now().isoformat(),
                    'likes': i * 10,
                    'reposts': i * 5,
                    'comments': i * 8,
                    'url': f"https://weibo.com/detail/{post_id}",
                    'platform': 'weibo',
                    'location': '北京' if i % 3 == 0 else ('上海' if i % 3 == 1 else '广州')
                }
                weibo_posts.append(post)
            
            self.logger.info(f"获取到{len(weibo_posts)}条微博数据")
            return weibo_posts
            
        except Exception as e:
            self.logger.error(f"获取微博数据失败: {str(e)}")
            return []
    
    def parse_weibo_html(self, html_content: str) -> List[Dict]:
        """
        解析微博HTML内容
        
        Args:
            html_content: 微博搜索页面HTML内容
            
        Returns:
            解析后的微博数据列表
        """
        try:
            soup = BeautifulSoup(html_content, 'html.parser')
            weibo_cards = soup.find_all('div', class_='card-wrap')
            
            weibo_posts = []
            for card in weibo_cards:
                # 提取微博内容
                content_elem = card.find('p', class_='txt')
                if not content_elem:
                    continue
                
                content = content_elem.text.strip()
                
                # 提取作者信息
                author_elem = card.find('a', class_='name')
                author = author_elem.text.strip() if author_elem else '未知用户'
                
                # 提取发布时间
                time_elem = card.find('p', class_='from')
                publish_time = time_elem.text.strip() if time_elem else ''
                
                # 提取微博链接
                link_elem = card.find('p', class_='from').find('a')
                url = f"https://weibo.com{link_elem['href']}" if link_elem and 'href' in link_elem.attrs else ''
                
                post = {
                    'content': content,
                    'author': author,
                    'publish_time': publish_time,
                    'url': url,
                    'platform': 'weibo'
                }
                weibo_posts.append(post)
            
            return weibo_posts
            
        except Exception as e:
            self.logger.error(f"解析微博HTML失败: {str(e)}")
            return []
    
    def get_hot_topics(self) -> List[Dict]:
        """
        获取微博热搜话题
        
        Returns:
            热搜话题列表
        """
        try:
            # 模拟数据
            hot_topics = [
                {'rank': 1, 'topic': '热搜话题1', 'heat': '5432万'},
                {'rank': 2, 'topic': '热搜话题2', 'heat': '4321万'},
                {'rank': 3, 'topic': '热搜话题3', 'heat': '3210万'},
                {'rank': 4, 'topic': '热搜话题4', 'heat': '2109万'},
                {'rank': 5, 'topic': '热搜话题5', 'heat': '1987万'},
                {'rank': 6, 'topic': '热搜话题6', 'heat': '1876万'},
                {'rank': 7, 'topic': '热搜话题7', 'heat': '1765万'},
                {'rank': 8, 'topic': '热搜话题8', 'heat': '1654万'},
                {'rank': 9, 'topic': '热搜话题9', 'heat': '1543万'},
                {'rank': 10, 'topic': '热搜话题10', 'heat': '1432万'}
            ]
            
            return hot_topics
            
        except Exception as e:
            self.logger.error(f"获取微博热搜失败: {str(e)}")
            return [] 